Examlex
Graph the function.
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Na+
Sodium ions, which are essential for various bodily functions including maintaining fluid balance and transmitting nerve impulses.
Extracellular Fluid
The fluid existing outside the cells, providing a medium for transporting nutrients, oxygen, and waste products to and from the cells.
Plasma Membrane
The lipid bilayer that encloses the cytoplasm of a cell, controlling the movement of substances in and out of the cell.
Selectively Permeable
A property of cell membranes that allows some substances to pass through while blocking others.
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